The NHRC-2 is an inexpensive repeater controller with real stored speech
and DTMF remote control. It is available assembled and tested, or as a
partial kit. The partial kit contains the printed circuit board, a
programmed PIC microcontroller, a MT8870 DTMF
decoder, and a complete manual on CD-ROM.
The manual contains ordering information
for all the remaining parts needed to build the controller. Typical cost
for building a NHRC-2 (including the partial kit itself) is around $60.

NHRC is pleased to present the NHRC-2 revision D Printed Circuit board!
This new layout features a smaller footprint, improved power routing to
the ISD chip for less noise, as well as silkscreened parts placement on
the component side to simplify assembly.